pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-22255-Three_Little_Drummers.ps) >>/Users/jc/w/tmp/Tune-22255-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/gradcenter.marlboro.edu/abc/sessionTunesII/Three_Little_Drummers.abc

Error exit status 256; here are some files to check:

[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Form_22255.log 726 Log file, useful mostly for debugging
Tune-22255-Three_Little_Drummers.abc 199 ABC music file with the extracted tune(s)
Tune-22255-Three_Little_Drummers.ps 34496 PostScript
Tune-22255-Three_Little_Drummers.txt 199 Plain-text file with the extracted tune(s)
Tune-22255-get.log 5034 Log file, useful mostly for debugging
These files should be available for 24 hours.